X-Isle [rumored]

X-Isle is a fast-paced, tactical FPS squad-shooter that features exciting new elements and 3D worlds set in both vast detailed outdoor and indoor areas. You will experience an Elite-Soldier`s life combating against an alien race within dozens of different detailed environments and vegetations, feeling the breath of fear on your shoulders.

This Xbox port was originally considered by the developer Crytek (PS2, Gamecube and even Dreamcast versions were also proposed), but it was never released. Instead, the development team went towards a new project -- the breakthrough FPS FarCry.